#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
int main()
{
  printf("我是一个进程：pid = %d\n",getpid());
  fork();
  printf("我依旧是一个进程：pid = %d\n",getpid());


  /*
  pid_t id = fork();
  if(id == 0)
  {
    //child
    while(1)
    {
      printf("我是子进程，pid = %d,ppid = %d\n",getpid(),getppid());
      sleep(1);
    }
  }
  else 
  {
    while(1)
    {
      printf("我是父进程，pid = %d,ppid = %d\n",getpid(),getppid());
      sleep(1);
    }
  }
  */
  return 0;
}
